I would like to know more about your URL redirects; Shopify doesn't have a tool for doing that but apps are available. Do you have all your product categories figured out and listed?
Relevant Skills and Experience
I have built several Shopify sites for international retail, including apps to connect with backend ERP and warehouse systems. I have over 20 years general development experience
Proposed Milestones
$50 CAD - Confirm data to be imported and whether it can be done via Shopify or requires 3rd party apps
$100 CAD - Prepare product template with descriptions, variants, prices, categories, tags, etc
$100 CAD - Prepare Customer template and usage in Shopify
$138 CAD - Upload and test and review UX
Additional Services Offered
$250 CAD - Analyze and prepare a plan for integrating Shopify data with your other apps
$1500 CAD - Develop automated tools to do above steps
Do you have Shopify experience? How are you planning on using Customer data?